Why push aldrin to do anything? He can do whatever he wants with his stake. You can rest assured he's going to use it well, no need to blabla in my eyes. Supporting contributions to the project sounds fine.
The system won't work if all the big stakes just hoards a big stake. If he finally does as he said, basically his nxt become dead because it is only sitting there for forging without entering the economy.
If this would be the case, then the initial distribution of NXT to stakeholder is in fact the problem. It was decided to do it the way it was done. There is no way to change the rules now. IMHO, aldrin has every right to do what he want with his NXT - technically and morally.
Apart from that, I think that the system DOES work even when all the big stakes just hoard a big stake. There is still a certain percentage of NXT moving around.
Big stakes will probably not hoard forever. It depends on the price made by the moving NXT, the potential NXT still has (over time) and the temptation of cashing out.
Marcus (small-stake)
It is just like adding a feature to nxt network to counterreact hoarding. If you want all kind of cool stufs for nxt why don't you want a feature that will make nxt a sustainable system? I am big stake definitely in top100. I am also economist. I am taking a position for the best of nxt network and the idea of decentralization.
You can't live in a NXT, nor eat them and they won't satisfy any real world demand without transferring them to someone else. So there are always natural incentives to spend them. The flow or availability of a certain amount of currency isn't a useful target or goal (except for gaming systems like Central Banks do, blowing bubbles and supplying only those directly around them with free money), but the consequence of exchanging goods and services. Currency is a mean to facilitate the trade of non-fungible goods and services.
Demand and supply will find the circumstantial sweet exchange spot for NXT. Hoarding won't hurt any other holder of NXT, on the contrary.
When they get definitely lost, they won't drain any more NXT from the market by forging, but also less NXT remain in circulation anyways. 1 billion units is a rather low number, so they will get further divisible to keep a practical unit of exchange.